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  <xs:element id="tdup_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTotalAwards" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTotalAwards" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="tdup_ClassBCommonStockWarrantMember" abstract="true" name="ClassBCommonStockWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_OperationsProductAndTechnologyExpense" abstract="false" name="OperationsProductAndTechnologyExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodAfterInitialPublicOfferingToCommenceVesting" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodAfterInitialPublicOfferingToCommenceVesting" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="tdup_MarketingExpenseMember" abstract="true" name="MarketingExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_SeriesE1ConvertiblePreferredStockIssued8142020Member" abstract="true" name="SeriesE1ConvertiblePreferredStockIssued8142020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_ReclassificationOfCommonStockBetweenClassesShares" abstract="false" name="ReclassificationOfCommonStockBetweenClassesShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tdup_ConsignmentMember" abstract="true" name="ConsignmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_SeriesDConvertiblePreferredStockIssued1222015Member" abstract="true" name="SeriesDConvertiblePreferredStockIssued1222015Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_TemporaryEquityConversionOfConvertibleSecuritiesValue" abstract="false" name="TemporaryEquityConversionOfConvertibleSecuritiesValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_IncreaseDecreaseInSellerPayable" abstract="false" name="IncreaseDecreaseInSellerPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_SellerPayableCurrent" abstract="false" name="SellerPayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_ShareBasedPaymentArrangementOptionFourYearVestingFromIPOMember" abstract="true" name="ShareBasedPaymentArrangementOptionFourYearVestingFromIPOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_AccruedVendorLiabilitiesCurrent" abstract="false" name="AccruedVendorLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_WesternAllianceBankTermLoanAndSecurityAgreementMember" abstract="true" name="WesternAllianceBankTermLoanAndSecurityAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_StockIncentivePlan2021Member" abstract="true" name="StockIncentivePlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_AccountsReceivableAllowanceForReturnsCurrent" abstract="false" name="AccountsReceivableAllowanceForReturnsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_SeriesFConvertiblePreferredStockIssued5292020Member" abstract="true" name="SeriesFConvertiblePreferredStockIssued5292020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_LoyaltyProgramMember" abstract="true" name="LoyaltyProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_StockIssuedDuringPeriodSharesWarrantsIssued" abstract="false" name="StockIssuedDuringPeriodSharesWarrantsIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tdup_ClassOfWarrantAndRightsCalculationPercentageOfLongTermDebtDraw" abstract="false" name="ClassOfWarrantAndRightsCalculationPercentageOfLongTermDebtDraw" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="tdup_DebtInstrumentMaximumBorrowingCapacity" abstract="false" name="DebtInstrumentMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_SeriesE1ConvertiblePreferredStockMember" abstract="true" name="SeriesE1ConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_OperationsProductAndTechnologyMember" abstract="true" name="OperationsProductAndTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_SeriesDConvertiblePreferredStockIssued4202015Member" abstract="true" name="SeriesDConvertiblePreferredStockIssued4202015Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_SeriesE1ConvertiblePreferredStockIssued2282021Member" abstract="true" name="SeriesE1ConvertiblePreferredStockIssued2282021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_ShareBasedPaymentArrangementOptionVestingFourYearsFromCommencementMember" abstract="true" name="ShareBasedPaymentArrangementOptionVestingFourYearsFromCommencementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_SeriesE1ConvertiblePreferredStockIssued272019Member" abstract="true" name="SeriesE1ConvertiblePreferredStockIssued272019Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tdup_StockholdersEquityConversionOfStockRatio" abstract="false" name="StockholdersEquityConversionOfStockRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tdup_ReductionInTheCarryingAmountOfRightOfUseAssets" abstract="false" name="ReductionInTheCarryingAmountOfRightOfUseAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tdup_NumberOfVotesForEachShareOfCommonStockHeld" abstract="false" name="NumberOfVotesForEachShareOfCommonStockHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
</xs:schema>
